______ refers to the amount of random error in the statistic computed from a sample due to the fact that each sample differs just by chance from the population.

Studies have shown that political action committees (PACs) contribute disproportionately to incumbent candidates. Why do PACs pursue this strategy in their campaign contributions?

What will be an ideal response?

"Concurrent" powers are those powers that

a. both the states and the national government have authority to exercise. b. must be approved by the Supreme Court before being exercised. c. regulate only state and local commerce. d. can only be exercised by the president. e. are not subject to judicial review.